Vulnerability-Lookup

GHSA-7452-XQPJ-6RPC

Vulnerability from github – Published: 2024-01-31 23:14 – Updated: 2024-06-10 18:39

Summary

moby Access to remapped root allows privilege escalation to real root

Details

Impact

When using --userns-remap, if the root user in the remapped namespace has access to the host filesystem they can modify files under /var/lib/docker/<remapping> that cause writing files with extended privileges.

Patches

Versions 20.10.3 and 19.03.15 contain patches that prevent privilege escalation from remapped user.

Credits

Maintainers would like to thank Alex Chapman for discovering the vulnerability; @awprice, @nathanburrell, @raulgomis, @chris-walz, @erin-jensby, @bassmatt, @mark-adams, @dbaxa for working on it and Zac Ellis for responsibly disclosing it to security@docker.com

Severity

6.8 (Medium)


                  
                    CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/moby/moby"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "19.3.15"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/moby/moby"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "20.10.0-beta1"
            },
            {
              "fixed": "20.10.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-21284"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-01-31T23:14:25Z",
    "nvd_published_at": "2021-02-02T18:15:00Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\n\nWhen using `--userns-remap`, if the root user in the remapped namespace has access to the host filesystem they can modify files under `/var/lib/docker/\u003cremapping\u003e` that cause writing files with extended privileges.\n\n### Patches\n\nVersions 20.10.3 and 19.03.15 contain patches that prevent privilege escalation from remapped user.\n\n### Credits\n\nMaintainers would like to thank Alex Chapman for discovering the vulnerability; @awprice, @nathanburrell, @raulgomis, @chris-walz, @erin-jensby, @bassmatt, @mark-adams, @dbaxa for working on it and Zac Ellis for responsibly disclosing it to security@docker.com",
  "id": "GHSA-7452-xqpj-6rpc",
  "modified": "2024-06-10T18:39:17Z",
  "published": "2024-01-31T23:14:25Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/moby/moby/security/advisories/GHSA-7452-xqpj-6rpc"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-21284"
    },
    {
      "type": "WEB",
      "url": "https://github.com/moby/moby/commit/64bd4485b3a66a597c02c95f5776395e540b2c7c"
    },
    {
      "type": "WEB",
      "url": "https://docs.docker.com/engine/release-notes/#20103"
    },
    {
      "type": "WEB",
      "url": "https://github.com/moby/moby/releases/tag/v19.03.15"
    },
    {
      "type": "WEB",
      "url": "https://github.com/moby/moby/releases/tag/v20.10.3"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/202107-23"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20210226-0005"
    },
    {
      "type": "WEB",
      "url": "https://www.debian.org/security/2021/dsa-4865"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "moby Access to remapped root allows privilege escalation to real root"
}

CVE-2021-21284 (GCVE-0-2021-21284)

Vulnerability from cvelistv5 – Published: 2021-02-02 17:55 – Updated: 2024-08-03 18:09

Title

privilege escalation in Moby

Summary

In Docker before versions 9.03.15, 20.10.3 there is a vulnerability involving the --userns-remap option in which access to remapped root allows privilege escalation to real root. When using "--userns-remap", if the root user in the remapped namespace has access to the host filesystem they can modify files under "/var/lib/docker/<remapping>" that cause writing files with extended privileges. Versions 20.10.3 and 19.03.15 contain patches that prevent privilege escalation from remapped user.

Severity

6.8 (Medium)


                        
                          CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N

CWE

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7580 records in the last 180 days details

References

8 references

URL	Tags
https://docs.docker.com/engine/release-notes/#20103	x_refsource_MISC
https://github.com/moby/moby/releases/tag/v20.10.3	x_refsource_MISC
https://github.com/moby/moby/releases/tag/v19.03.15	x_refsource_MISC
https://github.com/moby/moby/security/advisories/…	x_refsource_CONFIRM
https://github.com/moby/moby/commit/64bd4485b3a66…	x_refsource_MISC
https://security.netapp.com/advisory/ntap-2021022…	x_refsource_CONFIRM
https://www.debian.org/security/2021/dsa-4865	vendor-advisoryx_refsource_DEBIAN
https://security.gentoo.org/glsa/202107-23	vendor-advisoryx_refsource_GENTOO

Impacted products

1 product

Vendor	Product	Version
moby	moby	Affected: < 19.03.15 Affected: >= 20.0.0, < 20.10.3

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T18:09:15.042Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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        }
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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